Whether the carotid atherosclerotic plaque is serious or not mainly lies in two points, as follows: First, whether the plaque is soft or not, the softness or hardness of the plaque can be judged under ultrasound, the soft plaque is also known as unstable plaque, which is easy to cause carotid thrombosis when the fibrous cap is dislodged, and then lead to intracranial embolism, this situation is more dangerous. Secondly, carotid atherosclerotic plaque causes stenosis and occlusion of blood vessels, which will affect the oxygen supply of the whole brain, resulting in transient syncope, black clouding and large cerebral infarction, when the carotid atherosclerotic plaque is more serious and requires active traditional surgical treatment or intracranial treatment to restore blood supply.